Cannabis most likely break up from its closest relative, Humulus (hops), through the mid Oligocene, about 27.8 million a long time back according to molecular clock estimates. The centre of origin of Cannabis is probably going in the northeastern Tibetan Plateau. The pollen of Humulus and Cannabis are quite identical https://mac-10-strain36654.blogofchange.com/27082493/detailed-notes-on-herbhaus